Loctite 603 Retaining Compound

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Description

Loctite 603 Low-visc High Strength Retaining Compound 50ml

  • Shear Strength, Steel : 3770
  • Temperature : -65 - 300 °F
  • Viscosity : 125 mPa.s (cP) Brookfield
  • Key Substrates : Metal: Steel
  • Color : Green
  • Curing Type : Anaerobic
  • Application : Retaining
 

LOCTITE 603 is a high-strength retaining compound. Designed for the bonding of cylindrical fitting parts, especially for sintered bearings and also where consistently clean surfaces cannot be assured. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration. It has a high oil tolerance.

  • High-strength retaining compound
  • Especially suitable for sintered bearings
  • High oil tolerance
LOCTITE®
603 is designed for the bonding of cylindrical fitting
parts, particularly where consistently clean surfaces cannot be
assured. The product cures when confined in the absence of
air between close fitting metal surfaces and prevents loosening
and leakage from shock and vibration. Typical applications
include retaining roller bearings or oil impregnated bushings
into housings.
NSF International

Registered to NSF Category P1 for use as a sealant where
there is no possibilty of food contact in and around food
processing areas. Note: This is a regional approval. Please
contact your local Technical Service Center for more
information and clarification.
TYPICAL CURING PERFORMANCE

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. The graph
below shows the shear strength developed with time on steel
pins and collars compared to different materials and tested
according to ISO 10123.
Cure Speed vs. Bond Gap

The rate of cure will depend on the bondline gap. The following
graph shows shear strength developed with time on steel pins
and collars at different controlled gaps and tested according to
ISO 10123.
Cure Speed vs. Temperature

The rate of cure will depend on the temperature. The graph
below shows the shear strength developed with time at
different temperatures on steel pins and collars and tested
according to ISO 10123.
Cure Speed vs. Activator

Where cure speed is unacceptably long, or large gaps are
present, applying activator to the surface will improve cure
speed. The graph below shows the shear strength developed
with time on zinc dichromate steel pins and collars using
Activator 7471™ and 7649™ and tested according to ISO
10123.
GENERAL INFORMATION

This product is not recommended for use in pure oxygen
and/or oxygen rich systems and should not be selected as
a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the
Safety Data Sheet (SDS).
Where aqueous washing systems are used to clean the
surfaces before bonding, it is important to check for
compatibility of the washing solution with the adhesive. In
some cases these aqueous washes can affect the cure and
performance of the adhesive.
This product is not normally recommended for use on plastics
(particularly thermoplastic materials where stress cracking of
the plastic could result). Users are recommended to confirm
compatibility of the product with such substrates.
Directions for use

For Assembly


  1. . For best results, clean all surfaces (external and internal)
    with a LOCTITE®
    cleaning solvent and allow to dry.
  2. If the material is an inactive metal or the cure speed is too
    slow, spray with Activator 7471™ or 7649™ and allow to
    dry.
  3. For Slip Fitted Assemblies, apply adhesive around the
    leading edge of the pin and the inside of the collar and
    use a rotating motion during assembly to ensure good
    coverage.
  4. For Press Fitted Assemblies, apply adhesive thoroughly
    to both bond surfaces and assemble at high press on
    rates.
  5. For Shrink Fitted Assemblies the adhesive should be
    coated onto the pin, the collar should then be heated to
    create sufficient clearance for free assembly.
  6. Parts should not be disturbed until sufficient handling
    strength is achieved.

For Disassembly


  1. Apply localized heat to the assembly to approximately
    250 °C. Disassemble while hot.

For Cleanup


  1. Cured product can be removed with a combination of
    soaking in a Loctite solvent and mechanical abrasion
    such as a wire brush.

Storage

Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
labeling.
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
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